dianfu edited a comment on issue #9851: [FLINK-14341]Fix flink-python builds failure: no such option: --prefix URL: https://github.com/apache/flink/pull/9851#issuecomment-539446689 @zentol I think it's because option `--prefix` is used in `gen_procos.py` and it can be used only for pip 8.0+. @liupc Thanks for reporting this issue and the PR. `--install-option` is slower(increased from 2s~5s to about 400s ~ 800s in my local machine) than `--prefix` as it disabled the use of [wheel](https://pip.pypa.io/en/stable/reference/pip_install/#per-requirement-overrides). What about trying to use option `--prefix` for pip 8.0+ and fallback to `--install-option` otherwise?
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